中国循环杂志
中國循環雜誌
중국순배잡지
Chinese Circulation Journal
2015年
11期
1096-1100
,共5页
刘燃%宋蕊%袁丽%凌露%杨萍%郭家智%张戈%陆地%孙林
劉燃%宋蕊%袁麗%凌露%楊萍%郭傢智%張戈%陸地%孫林
류연%송예%원려%릉로%양평%곽가지%장과%륙지%손림
人参皂苷Rg1%磷脂酰肌醇3激酶%缺氧诱导因子-1α%内质网应激%凋亡
人參皂苷Rg1%燐脂酰肌醇3激酶%缺氧誘導因子-1α%內質網應激%凋亡
인삼조감Rg1%린지선기순3격매%결양유도인자-1α%내질망응격%조망
Ginsenoside-rg1%Phosphoinositide-3 kinase%Hypoxia inducible factor-1α%Endoplasmic reticulum stress%Apoptosis
目的:从细胞和分子层面探讨人参皂苷Rg1(G-Rg1)对心肌细胞的影响及其信号传导机制。<br> 方法:体外培养大鼠H9c2心肌细胞,按实验要求随机分13组,每组5个平行孔,分别为空白对照组,单纯缺血缺氧2 h、6 h、12 h、24 h、48 h组,G-Rg15μmol/L、10μmol/L、50μmol/L组,缺氧诱导因子-1α(HIF-1α)的特异性抑制剂(YC-1)组,YC-1+G-Rg1组,蛋白激酶B(Akt)蛋白的磷酸化特异性抑制剂(Wortmannin)组, Wortmannin+G-Rg1组。检测G-Rg1、缺血缺氧以及YC-1对心肌细胞活力及心肌细胞损伤的影响。同时用逆转录聚合酶链反应(RT-PCR)检测心肌细胞内HIF-1α、葡萄糖载体蛋白-1(GLUT-1)和血红素氧合酶-1(HO-1)的信使核糖核酸mRNA表达水平变化。用蛋白质免疫印迹法检测HIF-1α、GLUT-1和HO-1、活化转录因子-6(ATF-6)、抑制CCAAT/增强子结合蛋白同源蛋白(CHOP)和Akt等细胞信号通路蛋白表达水平变化。<br> 结果:缺血缺氧时间与心肌细胞活力呈负相关(r=-0.8580,P<0.05),与乳酸脱氢酶溢出率呈正相关(r=0.9201, P<0.05)。G-Rg110μmol/L组较单纯缺血缺氧24 h组细胞活力明显回升(87.8%、62.6%,P<0.05),细胞培养上清乳酸脱氢酶(LDH)含量明显减少(25.0%、74.8%,P<0.05),且上调了HIF-1α、GLUT-1、HO-1的mRNA表达水平(P<0.05)。蛋白质免疫印迹法分析显示:YC-1+G-Rg1组较G-Rg1组,心肌细胞活力下降(68.0%,87.8%,P<0.05),细胞培养上清LDH含量增加(56.4%,25.0%,P<0.05),同时YC-1拮抗了G-Rg1对HIF-1α、GLUT-1、HO-1、ATF-6和CHOP的蛋白表达水平的调控(P<0.05);Wortmannin可拮抗G-Rg1对HIF-1α和CHOP的蛋白表达水平的调控(P<0.05),及对Akt两个磷酸化位点的激活作用(P<0.05)。<br> 结论:心肌细胞损伤程度与缺血缺氧时间有关;G-Rg1对心肌细胞具有保护作用,其机制激活HIF-1α及其下游因子的表达并抑制了内质网应激效应,可能与G-Rg1激活Akt有关。
目的:從細胞和分子層麵探討人參皂苷Rg1(G-Rg1)對心肌細胞的影響及其信號傳導機製。<br> 方法:體外培養大鼠H9c2心肌細胞,按實驗要求隨機分13組,每組5箇平行孔,分彆為空白對照組,單純缺血缺氧2 h、6 h、12 h、24 h、48 h組,G-Rg15μmol/L、10μmol/L、50μmol/L組,缺氧誘導因子-1α(HIF-1α)的特異性抑製劑(YC-1)組,YC-1+G-Rg1組,蛋白激酶B(Akt)蛋白的燐痠化特異性抑製劑(Wortmannin)組, Wortmannin+G-Rg1組。檢測G-Rg1、缺血缺氧以及YC-1對心肌細胞活力及心肌細胞損傷的影響。同時用逆轉錄聚閤酶鏈反應(RT-PCR)檢測心肌細胞內HIF-1α、葡萄糖載體蛋白-1(GLUT-1)和血紅素氧閤酶-1(HO-1)的信使覈糖覈痠mRNA錶達水平變化。用蛋白質免疫印跡法檢測HIF-1α、GLUT-1和HO-1、活化轉錄因子-6(ATF-6)、抑製CCAAT/增彊子結閤蛋白同源蛋白(CHOP)和Akt等細胞信號通路蛋白錶達水平變化。<br> 結果:缺血缺氧時間與心肌細胞活力呈負相關(r=-0.8580,P<0.05),與乳痠脫氫酶溢齣率呈正相關(r=0.9201, P<0.05)。G-Rg110μmol/L組較單純缺血缺氧24 h組細胞活力明顯迴升(87.8%、62.6%,P<0.05),細胞培養上清乳痠脫氫酶(LDH)含量明顯減少(25.0%、74.8%,P<0.05),且上調瞭HIF-1α、GLUT-1、HO-1的mRNA錶達水平(P<0.05)。蛋白質免疫印跡法分析顯示:YC-1+G-Rg1組較G-Rg1組,心肌細胞活力下降(68.0%,87.8%,P<0.05),細胞培養上清LDH含量增加(56.4%,25.0%,P<0.05),同時YC-1拮抗瞭G-Rg1對HIF-1α、GLUT-1、HO-1、ATF-6和CHOP的蛋白錶達水平的調控(P<0.05);Wortmannin可拮抗G-Rg1對HIF-1α和CHOP的蛋白錶達水平的調控(P<0.05),及對Akt兩箇燐痠化位點的激活作用(P<0.05)。<br> 結論:心肌細胞損傷程度與缺血缺氧時間有關;G-Rg1對心肌細胞具有保護作用,其機製激活HIF-1α及其下遊因子的錶達併抑製瞭內質網應激效應,可能與G-Rg1激活Akt有關。
목적:종세포화분자층면탐토인삼조감Rg1(G-Rg1)대심기세포적영향급기신호전도궤제。<br> 방법:체외배양대서H9c2심기세포,안실험요구수궤분13조,매조5개평행공,분별위공백대조조,단순결혈결양2 h、6 h、12 h、24 h、48 h조,G-Rg15μmol/L、10μmol/L、50μmol/L조,결양유도인자-1α(HIF-1α)적특이성억제제(YC-1)조,YC-1+G-Rg1조,단백격매B(Akt)단백적린산화특이성억제제(Wortmannin)조, Wortmannin+G-Rg1조。검측G-Rg1、결혈결양이급YC-1대심기세포활력급심기세포손상적영향。동시용역전록취합매련반응(RT-PCR)검측심기세포내HIF-1α、포도당재체단백-1(GLUT-1)화혈홍소양합매-1(HO-1)적신사핵당핵산mRNA표체수평변화。용단백질면역인적법검측HIF-1α、GLUT-1화HO-1、활화전록인자-6(ATF-6)、억제CCAAT/증강자결합단백동원단백(CHOP)화Akt등세포신호통로단백표체수평변화。<br> 결과:결혈결양시간여심기세포활력정부상관(r=-0.8580,P<0.05),여유산탈경매일출솔정정상관(r=0.9201, P<0.05)。G-Rg110μmol/L조교단순결혈결양24 h조세포활력명현회승(87.8%、62.6%,P<0.05),세포배양상청유산탈경매(LDH)함량명현감소(25.0%、74.8%,P<0.05),차상조료HIF-1α、GLUT-1、HO-1적mRNA표체수평(P<0.05)。단백질면역인적법분석현시:YC-1+G-Rg1조교G-Rg1조,심기세포활력하강(68.0%,87.8%,P<0.05),세포배양상청LDH함량증가(56.4%,25.0%,P<0.05),동시YC-1길항료G-Rg1대HIF-1α、GLUT-1、HO-1、ATF-6화CHOP적단백표체수평적조공(P<0.05);Wortmannin가길항G-Rg1대HIF-1α화CHOP적단백표체수평적조공(P<0.05),급대Akt량개린산화위점적격활작용(P<0.05)。<br> 결론:심기세포손상정도여결혈결양시간유관;G-Rg1대심기세포구유보호작용,기궤제격활HIF-1α급기하유인자적표체병억제료내질망응격효응,가능여G-Rg1격활Akt유관。
Objective: To investigate the effect of ginsenoside-rg1 (G-Rg1) on rat’s cardiomyocytes H9c2 with its mechanism of signal pathwayin vitro. <br> Methods: H9c2 cells were cultured and treated in different conditions by following groups:①Blank control group,②Hypoxia alone group, the cells were treated for (2, 6, 12, 24, 48) hr respectively,③G-Rg1 group, the cells were treated by G-Rg1 at (5, 10, 50) μmol/L respectively,④YC-1 group, which is the speciifc inhibitor of hypoxia inducible factor-1α (HIF-1α),⑤YC-1 + G-Rg1 group,⑥Wortmannin group, which is the speciifc inhibitor for protein kinase B (Akt) phosphorylation and⑦Wortmannin + G-Rg1 group. Each experiment was conducted with 5 replicates. The effects of G-Rg1, hypoxia and YC-1 on cell activity and injury were studied; intracellular mRNA expressions of HIF-1α, glucose transporter-1 (GLUT-1) and heme oxygenase-1 (HO-1) were examined by RT-PCR; protein expressions of HIF-1α, GLUT-1, HO-1, activating transcription factor-6 (ATF-6), CCAAT/enhancer binding protein homologous protein (CHOP) and Akt with its signal pathway factors were measured by Western blot analysis. <br> Results: The time of hypoxia was negatively related to cell activity (r=-0.8580,P<0.05) and positively related to LDH overlfow rate (r=0.9201,P<0.05). G-Rg1 (10μmol/L) group showed increased cell activity than Hypoxia alone (24 hr) group (87.8% vs 62.6 %,P<0.05), while decreased LDH overlfow (25.0% vs 74.8%,P<0.05), and up-regulated mRNA expressions of HIF-1α, GLUT-1 and HO-1, P<0.05. YC-1+ G-Rg1 group had decreased cell activity than G-Rg1 group (68.0% vs 87.8%,P<0.05), while increased LDH overlfow (56.4% vs 25.0%,P<0.05). Meanwhile, YC-1 clashed the effect of G-Rg1 on protein expressions of HIF-1α, GLUT-1, HO-1, ATF-6 and CHOP,P<0.05; wortmannin clashed the effect of G-Rg1 on protein expressions of HIF-1α, CHOP,P<0.05 and suppressed the two phosphorylation sites for Akt activation,P<0.05. <br> Conclusion: G-Rg1 may protect rat’s H9c2 cellsin vitro by activating expressions of HIF-1α with its downstream factors and inhibiting endoplasmic reticulum stress, which might be related to the effect of G-Rg1 on Akt activation.